JP6502207B2 - Vehicle mirror device - Google Patents

Description

  The present invention relates to a vehicle mirror device.

  Conventionally, a vehicle mirror device such as a door mirror device includes a base fixed to a vehicle body, a shaft fixed to the base by a bolt, and a mirror unit supported by the shaft. The mirror unit includes a mirror, and is rotatably provided, for example, about the axis of the shaft with respect to the shaft. In the vehicle mirror device disclosed in Patent Document 1, the base and the shaft are made of resin, and weight reduction is achieved.

JP, 2014-180932, A

  By the way, when the base and the shaft are made of resin, the axial force of the fastening member acts on the resin member. In this case, due to the creep phenomenon in which the amount of plastic deformation of the base increases with time, the fixing force between the base and the shaft may decrease with time. The higher the temperature, the faster the rate of increase in the amount of plastic deformation, so the fixing force tends to be reduced in a vehicle mirror device exposed to the outside of the vehicle and exposed to high temperatures.

  On the other hand, it is conceivable to insert a metal collar into the base and insert a metal nut into the shaft to make the portion on which the axial force of the fastening member acts be the metal member. However, when the above measures are taken, there is a problem that the productivity is reduced or the weight of the apparatus is increased due to the increase of the number of parts and the increase of the number of manufacturing processes.

  The present invention has been made in view of the above-mentioned point, and its object is to suppress a secular deterioration of fixing force between a base and a shaft while suppressing a decrease in productivity and an increase in device weight. It is providing a mirror device for vehicles.

  The present invention comprises a base fixed to a vehicle body, a shaft provided so as to protrude from the base, a fastening member fastening the shaft and the base, and a mirror unit supported by the shaft including a mirror. It is a mirror device for vehicles provided with. The base and the shaft are made of resin. The fastening members are pins that are welded to both the base and the shaft.

  Thus, since the base and the shaft are fastened using the welding pin instead of the conventional screw, no axial force acts on the base and the shaft. Therefore, it can be avoided that the fixing force between the base and the shaft is reduced due to the creep phenomenon caused by the influence of the axial force. In addition, since it is not necessary to separately embed a metal member such as an insert collar in the base and the shaft, it is possible to avoid that the productivity is reduced or the device weight is increased due to the increase in the number of parts and the number of manufacturing steps. Therefore, according to the present invention, while the decrease in productivity and the increase in device weight are suppressed, the secular decrease in the fixing force between the base and the shaft is suppressed.

It is an exploded perspective view when the mirror device for vehicles by one embodiment of the present invention is seen from the right front of vehicles. It is a perspective view when the mirror apparatus for vehicles of FIG. 1 is seen from the driver's seat of a vehicle. It is the III-III sectional view taken on the line of FIG. 2, and is a sectional view which passes along the axial center of a shaft. It is sectional drawing which expands and shows the welding pin of FIG. 3, and its periphery. It is a figure when the welding pin of FIG. 4 is seen in the arrow V direction.

Hereinafter, embodiments of the present invention will be described based on the drawings.
[One embodiment]
A vehicle mirror device according to an embodiment of the present invention is shown in FIGS. The vehicle mirror device 10 is fixed to the right door 90 which is a part of the vehicle body. The door mirror device mounted to the left door of the vehicle has the same configuration except that it is symmetrical with respect to the vehicle mirror device 10.

(Schematic Configuration of Vehicle Mirror Device)
First, a schematic configuration of the vehicle mirror device 10 will be described with reference to FIGS. 1 to 3.
The vehicle mirror device 10 is a “fastening member” that fastens the base 11 fixed to the door 90, the shaft 12 provided so as to project upward from the base 11, and the base 11 and the shaft 12 A welding pin 13 and a mirror unit 14 supported by a shaft 12 are provided.

  The base 11 forms a vehicle body mounting portion 21 and a shaft mounting portion 22. The vehicle body mounting portion 21 has three cylindrical bosses 23 and is fastened to the door 90 by bolts 24 inserted into the bosses 23. The shaft attachment portion 22 is formed to protrude outward from the vehicle body attachment portion 21 in the vehicle width direction, and has a plurality of through holes 25 penetrating in the vertical direction. Although three through holes 25 are provided in the present embodiment, only one is shown in FIG. 3 for the sake of convenience. The bolt 24 and the like are hidden from the outside by the cover 15.

  The shaft 12 has a plurality of insertion holes 26 formed at locations corresponding to the through holes 25 in the lower end portion. In the present embodiment, three insertion holes 26 are provided, but for convenience, only one is shown in FIG.

  The mirror unit 14 includes a cup-shaped housing 27, a mirror 28 provided at the opening of the housing 27, a mirror surface angle adjusting mechanism (not shown) provided between the housing 27 and the mirror 28, and the housing 27. And a motorized storage mechanism 29 provided between the shaft 12 and the motor. The electric storage mechanism 29 is composed of, for example, a motor and a reduction gear, and can rotate the housing 27 with respect to the shaft 12 around the axis AX of the shaft 12.

(Detailed configuration of base, shaft and welding pin)
Next, detailed configurations of the base 11, the shaft 12 and the welding pin 13 will be described with reference to FIGS.
The base 11 and the shaft 12 are made of resin. The welding pin 13 is made of metal.
The welding pin 13 has a first shaft 31 welded to the inner wall of the through hole 25, a second shaft 32 welded to the inner wall of the insertion hole 26, and a second shaft relative to the first shaft 31. And a head 33 provided on the opposite side to the portion 32. The welding pin 13 is welded to both the base 11 and the shaft 12.

  Irregularities are formed on portions of the welding pin 13 welded to the base 11 and the shaft 12, that is, the outer walls of the first shaft portion 31 and the second shaft portion 32. For example, an oblique knurl, a flat knurl, or an eyelid knurl is adopted as this unevenness.

  The head 33 is formed in a flat shape, that is, a shape without unevenness, around the axis AX. In the present embodiment, the cross-sectional shape of the outer wall of the head 33 is circular and not hexagonal. Also, no hole is formed at the axial end of the head 33. That is, the head 33 has a function to prevent tampering and can not be turned by a general-purpose tool such as a spanner or a screw driver.

The outer diameter D2 of the first shaft portion 31 is smaller than the outer diameter D1 of the head portion 33. Further, the outer diameter D3 of the second shaft portion 32 is smaller than the outer diameter D2 of the first shaft portion 31. The welding pin 13 is a stepped pin whose outer diameter gradually decreases in the insertion direction. The step surface between the head portion 33 and the first shaft portion 31 is in contact with the base 11.
The inner wall of the insertion hole 26 defines a first space 34 between the welding pin 13 and the side opposite to the second shaft 32 with respect to the first shaft 31.

  The inner diameter D4 of the edge portion 35 on the base 11 side of the inner wall of the insertion hole 26 is set larger than the outer diameter D2 of the first shaft portion 31 and the outer diameter D3 of the second shaft portion 32. The edge 35 defines a second space 36 between itself and the welding pin 13.

Of the inner wall of the through hole 25, the edge 37 opposite to the shaft 12 is chamfered. The edge 37 defines a third space 38 between itself and the welding pin 13.
In the spaces 34, 36, 38, the resin melted and extruded when the welding pin 13 is thermally pressed into the through hole 25 and the insertion hole 26 is collected.

(effect)
As described above, the vehicle mirror device 10 according to the present embodiment comprises the base 11 fixed to the vehicle body, the shaft 12 provided so as to protrude from the base 11, the shaft 12 and the base 11 fastened together. And a mirror unit 14 including a mirror 28 and supported by the shaft 12. The base 11 and the shaft 12 are made of resin. The welding pin 13 is welded to both the base 11 and the shaft 12.

  As described above, since the base 11 and the shaft 12 are fastened using the welding pin 13 instead of the conventional screw, no axial force acts on the base 11 and the shaft 12. Therefore, it can be avoided that the fixing force between the base 11 and the shaft 12 is reduced due to the creep phenomenon caused by the influence of the axial force. In addition, since it is not necessary to separately embed a metal member such as an insert collar in the base 11 and the shaft 12, it is possible to prevent the productivity from decreasing and the device weight from increasing due to the increase in the number of parts and the number of manufacturing steps. it can. Therefore, according to the present embodiment, the decrease in the fixing force between the base 11 and the shaft 12 over time is suppressed while the decrease in productivity and the increase in device weight are suppressed.

Further, in the present embodiment, the welding pin 13 has irregularities formed in the portion welded to the base 11 and the shaft 12.
Therefore, when the welding pin 13 is thermally pressed into the through hole 25 and the insertion hole 26, the molten resin enters the concave and convex portion of the welding pin 13. This prevents the welding pin 13 from coming off.

Further, in the present embodiment, the base 11 has a through hole 25 through which the welding pin 13 passes. The shaft 12 has an insertion hole 26 in which the welding pin 13 is inserted. The welding pin 13 is a stepped pin having a first shaft 31 welded to the base 11 and a second shaft 32 welded to the shaft 12 and having an outer diameter smaller than that of the first shaft 31. .
Therefore, when the welding pin 13 is thermally pressed into the through hole 25 and the insertion hole 26, the second shaft 32 can be prevented from melting the melting margin of the inner wall of the through hole 25 to which the first shaft 31 is to be welded. .

Further, in the present embodiment, the inner wall of the insertion hole 26 defines a first space 34 between the welding pin 13 and the opposite side of the first shaft 31 to the second shaft 32. Further, the edge 35 on the base 11 side of the inner wall of the insertion hole 26 defines a second space 36 with the welding pin 13. Further, of the inner wall of the through hole 25, the edge 37 opposite to the shaft 12 defines a third space 38 with the welding pin 13.
Therefore, the resin melted and extruded when the welding pin 13 is thermally pressed into the through hole 25 and the insertion hole 26 can be stored in the spaces 34, 36, 38.

Further, in the present embodiment, the head portion 33 of the welding pin 13 is formed in a flat shape around the axis AX. The cross-sectional shape of the head 33 is circular, and no hole is formed at the axial end of the head 33.
Therefore, the head 33 can not be turned by a general-purpose tool such as a spanner or a screw driver. This can prevent the user from accidentally breaking the welding pin 13 for breakage.

[Other embodiments]
In other embodiments of the present invention, the base and the shaft may be fastened by two or less or four or more welding pins.
In another embodiment of the present invention, the unevenness formed on the outer wall of the welding pin may be constituted by a projection or a groove other than the knurling.
In another embodiment of the present invention, the welding pin may have an outer diameter of a portion welded to the base and an outer diameter of a portion welded to the shaft.
In another embodiment of the present invention, the outer diameter of the head portion of the welding pin may be smaller than the outer diameter of the first shaft portion.

In another embodiment of the present invention, the cross-sectional shape of the head of the welding pin may be a polygon including a hexagon. In the case of a hexagon, the function of preventing tampering is lost.
In other embodiments of the present invention, the welding pin may not have a head.
In other embodiments of the invention, the outer wall of the welding pin may be tapered.
In another embodiment of the present invention, any one or more of the first to third spaces may not be provided.

In other embodiments of the present invention, the motorized storage mechanism may not be provided. The shaft may support the mirror unit including the mirror.
In another embodiment of the present invention, the vehicle mirror device may be a mirror device other than a door mirror device.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the scope of the invention.

11 ... base 12 ... shaft 13 ... welding pin (fastening member) 14 ... mirror unit 25 ... through hole 26 ... insertion hole 28 ... mirror 31 ... first axis Part 32 ··· Second shaft

Claims (5)

A base (11) fixed to the vehicle body,
A shaft (12) provided to project from the base;
A fastening member (13) fastening the shaft and the base;
A mirror unit (14) that includes a mirror (28) and is supported on the shaft;
Equipped with
The base and the shaft are made of resin and
The mirror device for a vehicle, wherein the fastening member is a pin welded to both the base and the shaft.   The mirror device for a vehicle according to claim 1, wherein the fastening member is formed with projections and depressions in a portion welded to the base and the shaft. The base has a through hole (25) through which the fastening member passes;
The shaft has an insertion hole (26) into which the fastening member is inserted,
The fastening member is a first shaft portion (31) welded to the inner wall of the through hole, and a second shaft portion (32) welded to the inner wall of the insertion hole and smaller in outer diameter than the first shaft portion The mirror device for a vehicle according to claim 1 or 2, wherein the mirror device is a stepped pin. The inner wall of the insertion hole defines a first space (34) between the first shaft portion and the fastening member on the side opposite to the second shaft portion,
Among the inner walls of the insertion hole, the edge (35) on the base side defines a second space (36) between the inner wall and the fastening member,
The edge (37) on the opposite side to the shaft, of the inner wall of the through hole, is characterized in that a third space (38) is defined between the inner wall and the fastening member. The mirror apparatus for vehicles as described. The fastening member further includes a head (33) provided on the opposite side to the second shaft with respect to the first shaft,
The said head is formed in the flat shape around the axial center of the said fastening member, The mirror apparatus for vehicles of Claim 3 or 4 characterized by the above-mentioned.

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